On Saturday I bottled 2 batches made in Mr Beer containers, and I think I mixed too much primer into the bottling bucket! For each 8.5 qt batch I mixed in almost 3/4 of a cup! My only saving grace may be that I used Mr Beer Booster instead of sugar. The Mr Beer manual says that Booster is not recommended for priming because it isn't entirely fermentable, so it tends to under-carbonate.
Did I just screw up 2 batches of beer?