When you're looking at the results of any processed waivers in your league chat, you have the ability to press on the bid amount to get a list of the submitted bids.
In some instances, you may see teams that had entered a higher bid but lost the claim. These teams will have "(Invalid)" listed next to them like in this claim:
There are a few different reasons as to why your bid would be deemed invalid:
You did not have enough FAAB
You did not have enough space on your roster because you won a previous bid, and you are not dropping a player on this bid
You tried to drop a player in this bid who you had already dropped in a previous successful bid. Even if you had an open roster spot to add the player, the bid would be unsuccessful because the dropped player has to be a part of it.