I've only tried Community Coffee k-cups thus far, and both times the grounds wound up in the coffee. Just wonder if this brand (Community) has the filter lower in the k-cup than others or if perhaps my Bunn is piercing the cup too deeply. Both times the filter was pierced by the lower "spike."

SOURCE: Brewed coffee mess

You may be grinding the coffee to fine making the draining a little slower. There's something called a fast flow filter that may help also. Also, make sure that you aren't jamming the filter down to partially block the drain hole ensuring that it is freely draining out unobstructed

SOURCE: Coffee grounds overflow out of basket into top of coffee pot.

Coffee overflowing onto the counter is a common complaint found in response to many automatic drip coffee makers. The following are potential solutions that can be used to rule out "operator error" vs. a defect or malfunction:

1. Do not "pack" or otherwise overfill the cone/basket with grinds.
2. Ensure you are using the correct grind for an automatic drip coffee maker, neither too fine nor too course. (See instruction manual.)
3. Do not overfill with water. Use the carafe to pour water into the reservoir. This is because a "cup" in coffee terms is defined as 6 oz, not 8 oz. Note: Some coffee makers define as little as 5 oz as a cup.
4. Make sure the filter cone/basket clicks into place and that the carafe is centered and pushed all the way in.
5. Try a permanent filter rather than a paper filter or vice versa.
6. Only use the correct permanent or paper filter (see manual).
7. Verify that the Pause 'n Serve button isn't sticking. If it is activated too long the brew will escape over the top of the cone/basket. This may be more apt to happen if the alignment of the carafe and the basket is incorrect.
8. Clean your machine with vinegar or as instructed by your user manual at least three times per year, more if your water supply is hard. A properly cleaned machine is less likely to suffer a burned out heating element, to take too long to brew, to produce "off" tasting coffee, or to clog and overrun the filter basket as the water runs through the grinds.
9. Ensure that the coffee machine is sitting level on the counter.

SOURCE: grounds in coffee. am using bunn coffee filters

Are you using a finer ground coffee? Or do you have a water softener, use filtered water or bottled water? If so, please call customer service to get a flow restrictor sprayhead which will eliminate this issue.

SOURCE: bunn 10 cup home coffee maker

It sounds like a seal/gasket is defective causing it to leak. Please locate the model and date code on the bottom of the brewer and contact customer service for troubleshooting and replacement options.

SOURCE: If i try to make more than 6 or 8 cups in my 10

This can occur with the use of finer ground coffee or use of soft water, filtered water, or bottled water. If you will call 800-352-2866 with the model and date code, we can send you a flow restrictor sprayhead which will alleviate this problem.