It's always good practice to compare prices, if possible, on comparable sites or checking price websites such as ph.priceprice.com
Also were your items directly from Lazada or via a 3rd party vendor. There seems a very large difference between the two amounts you posted (11k+ and 706) so it's difficult to say one way or another.
Although you have to watch Lazada carefully as they've yet to raise themselves to the level of an Amazon or even with the system level of an Aliexpress (Aliexpress holds back payment to the seller until you receive delivery). As with any price or product you as the buyer must research enough so you're comfortable with the vendor, price, quality, etc.
Feel free to contact Lazada and ask them to explain the recent large price differential you experienced. I almost always both call and email them when I have difficulty with an order for any reason. I've ordered items recently and both orders arrived in decent time, all times ordered were as described and in brand new, untouched condition. Again, however, I tend to avoid the 3rd party sellers on Lazada unless I have thoroughly researched them and have a sufficient comfort level with that 3rd party vendor's reputation.
Hope that helps a bit.