I like to think of myself as liberal, but I frequently find myself on the opposite side of many other liberals.
No doubt someone has already mentioned this, apologies if it has already been addressed.
Liberal and Conservative aren't really absolutes, they're a sliding scale. I'm not an American, but based on other democratic countries dominated by two major opposing parties, you'll probably find that Democrats aren't really that far along the "liberal" scale and Republicans aren't really that far along the "conservative" scale. Both are probably somewhat off-centre.
However people supporting each group may be further along the scale than their party, especially in particular issues. There is no doubt extremist liberals and extremist conservatives.
The problem with extremism is it becomes very hard to distinguish differences in the scale.
An extreme leftist cannot distinguish between somone slightly left of centre, someone slightly right of centre, and an extreme rightist.
In that regard, while yourself being left, other people who are more extreme in their leftist views may perceive you as being right wing.
This is typical of ALL extremists - hence why Islamic terrorists will as readily attack muslims as they will Jews - because in their mind there's little difference between a moderate muslim, a moderate Jew and an extremist Jew.
It is a part of man that makes life pretty miserable for more moderate people such as myself. You are forever attacked by both extreme camps for being part of the other extreme camp.
Is so frustrating to enter a discussion, for example, about Palestine/Israel and get tagged a murdering Islamic Terrorist by one side and a Zion-loving "Jew-dog" by the other, for a single comment!
*sigh*
-Andrew