i assume you are still using HEM? i singled players out alot and used the tracker to help give myslef really good notes on players in game, it's really helpful when you have like 10+ regular players you come up against, but can't quite remember certain things that you need to remember about them.
if so you need to get into your data you have specifically on this player, since it's been so long since i've used it i've forgotten how to do it exactly.
But you basically go into his stats, and then filter for hands in which you saw his showdowns. You can then see how he's played several hundred hands to get a clearer picture of if this guy is truly a spazz or if your mind is playing tricks on you. Like, you will se hands vs yourself and see how he plays vs others.
if there is some rivalry between you two he's more likely to try and make moves on you, so he may not play the same way vs other players, which is why i try to avoid confrontation at the poker tables and instead prefer to make friends at the tables so it's easier to take their money.
apart from that looking at his in depth stats may help paint a clearer picture. and keep in mind having 2k hands on a player really still isn't that much in the whole scheme of things.
Having stuff like note caddy can help at times, however it usually just gives you an overload of information which is basically useless in the bigger picture. Instead try to get a general idea of what this players personality is like. Does he seem like the type of player who will go after other players, is he just playing for fun and likes to splash around. if you can work that out, you can work out what he's likely to do in a lot of differant spots, and once you know that, you can tailor a gameplan against this guy to take advantage of all and any weakspots you can take advantage of.
so instead of note caddy saying he calls with 62o and does whatever postflop, put down useful things like, "this player seems to target me and there's a possible rivalry between us" or "this player pulls moves on me, but doesn't seem to do the same things to other plaeyrs" whatever it is that you notice about him, and make sure you date the notes you take as you may want to review the player at a later date as he may have changed his style of play or whatever.