Veins increased and worse on thighs and back of calves after sclerotherapy. (Photos)

From the pictures posted, there appears to be a combination of small spider veins, some matting (this is enlargement of smaller tiny red veins after sclerotherapy or other procedures as a result of inflammation and dilatation of the tiny vessels) and a bit of hyperpigmentation or brownish discoloration. 
I think you need more sclerotherapy with a different sclerosant agent not prone to cause matting such as 72% glycerin or chromated glycerin.  Keep in mind you only had 2 sessions a full year apart. Spider veins generally take several treatment to fully go away.  In addition to this, it may necessary to do an ultrasound evaluation to assess pressure from larger internal veins resulting in the exterior veins becoming more visible.  I recommend you see a vein specialist for a more complete evaluation.

If you have any underlying issues with your circulation, it may cause more spider veins or spider vein complications (matting). Sometimes small feeder veins need to be injected using ultrasound as well. Surface lasers don't do as well as we'd like for these kinds of veins.

The posted pictures look like small spider veins and staining post sclerotherapy. Staining is a difficult problem to treat and usually improves over time (I have seen this take 2 years).  Some staining may not improve. You basically have 3 choices for your veins:  leave alone, sclerotherapy or topical laser.  I would recommend seeing a vein specialist for a full venous evaluation including a venous ultrasound to look for underlying venous reflux.