Minimum bids?

So, I bid $25, someone out bid me at $26, I tried to up my bid and got the message that $10 was the minimum…wtf?

This happens when someone has a Proxy Bid. Basically if there is an auction that starts at $10.00, I can make a proxy bid of $75.00, I then am winning at $10.00. If you bid $20.00, I automatically am winning at $21.00, you bid again at $31.00, my bid wins at $32.00, you bid at $42.00, I’m at $43.00, you bid at $53.00, I win at $54.00… This goes until your bid beats my Proxy bid of $75.00. Hope this helps.